Tachyon: The Fringe Cheats (PC)

Bring up the command window by hitting [7] on the numpad, then type:

  IM A CHEATER = Cheat Codes Enabled 
  ONE MILLION DOLLARS = Add 5000 Credits 
  QUICKENING = God Mode 
  COME GET SOME = Full Ammo 
  DILITHIUM = Full Energy 
  THERE IS NO SPOON = Return to Starbase to Win 
  BOOM STICK = All Items Available 
  RAGTAG = All Ships Available 
  KESSEL RUN Enhance Ship

If you don't want to type in the cheat code for ships, but still want to fly the ship of
your choice in either campaign, use a hex editor and look for the following offsets.
Then, set that offset to "01".
  550C: Pegasus Interceptor
  5520: Battleaxe Fighter
  5510: Orion Fighter
  5524: Cutlass Bomber
  5514: Archangel Fighter
  5528: Mace Interceptor
  5518: Phoenix Heavy Bomber
  552C: Warhammer Fighter
  551C: Poseidon Bomber
  5530: Claymore Heavy Bomber
  5534: Mako Economy Fighter

When using afterburners, hold Q.

Use the afterburners to accelerate to full speed, then hold Q. If done correctly, your
ship will maintain its current speed and direction until the key is released without
using any afterburner energy.

Bring up the command window by hitting [7] on the numpad, then type:
  IM A CHEATER - Cheats Enabled
  ONE MILLION DOLLARS - Add 5000 Credits
  QUICKENING - God Mode
  COME GET SOME - Full Ammo
  DILITHIUM - Full Energy
  THERE IS NO SPOON - Return to Starbase to Win
  BOOM STICK - All Items Available
  RAGTAG - All Ships Available
  KESSEL RUN - Enhance Ship
  SAY AHH - Open a Closed Gate (Target Closed Gate)

  Using a hex editor, look for offset ...018. The hex number is set up in the standard
savegame way, with two digits in pairs from lowest to higest place (i.e., if you have
6000 credits, that's 1770 in hexidecimal, and that would be laid out like this" 70 17 00"
.. etc.). Then, you can overwrite this offset and modify the amount of credits you have.
If you use FF FF, this translates into 65,535 credits.